EP3737862B1 - Machine hydraulique, unité hydraulique comportant la machine hydraulique et axe hydraulique comportant la machine hydraulique - Google Patents

Machine hydraulique, unité hydraulique comportant la machine hydraulique et axe hydraulique comportant la machine hydraulique Download PDF

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Publication number
EP3737862B1
EP3737862B1 EP19700638.0A EP19700638A EP3737862B1 EP 3737862 B1 EP3737862 B1 EP 3737862B1 EP 19700638 A EP19700638 A EP 19700638A EP 3737862 B1 EP3737862 B1 EP 3737862B1
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EP
European Patent Office
Prior art keywords
hydraulic machine
hydraulic
rotation
axis
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
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EP19700638.0A
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German (de)
English (en)
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EP3737862A1 (fr
Inventor
Andreas Guender
Jan Lukas Bierod
Johannes Schwacke
Saskia Ryznar
Oleg Stefanjuk
Marco Scholz
Emil Hanauer
Rene HUETTL
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3737862A1 publication Critical patent/EP3737862A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
    • F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves

Definitions

  • the invention relates to a hydraulic machine according to the preamble of patent claim 1, a hydraulic unit with the hydraulic machine according to claim 11, and a hydraulic axle with the hydraulic machine according to claim 12.
  • the heart of a hydraulic circuit is a hydraulic machine, in particular a hydraulic pump. It is used to convert mechanical energy into hydraulic energy, in particular into hydrostatic energy, of a pressure medium conveyed by it. In the case of operation as a hydraulic motor, the conversion takes place in the opposite direction. During energy conversion, losses occur which, in the case of the hydraulic circuit, lead in particular to heating of the pressure medium. The loss occurring in the hydraulic machine or machines is responsible for the majority of the heating of the pressure medium, a much smaller part is caused by flow losses in lines. The heating of the pressure medium in the hydraulic pump is particularly great.
  • the thermal energy that occurs as a result of losses in the hydraulic pump is carried away by the pumped pressure medium into the hydraulic circuit until it is dissipated as heat to a coolant by means of an external heat exchanger.
  • the thermal energy is distributed over a large volume of oil, which means that a large amount of pressure medium has to be circulated in order to dissipate the heat.
  • Due to the large amount of pressure medium, however, a ⁇ T to the recooling coolant is comparatively small, so that the efficiency of the external heat exchanger is low and its heat exchange surface must be large, which keeps investment and operating costs high.
  • the cooling can be done, for example, by an external tube bundle or plate heat exchanger.
  • Coolant is water, for example.
  • both heat exchangers there is a risk of water entering the hydraulic oil, as the oil and cooling water sides are only separated by a seal in the case of the tube bundle heat exchanger and only by a thin layer of solder in the case of the plate heat exchanger. Both seals can fail due to operational wear and thus endanger the operational safety of the hydraulic machine and the components and processes it supplies through water ingress into the hydraulic oil.
  • the pamphlets DE 94 11163 U1 , JPH 08 22 64 12 and DE 27 03 686 each show a solution in which cooling takes place by flushing a housing interior of the hydraulic pump with pressure medium.
  • the pressure medium discharged from the hydraulic pump in this way is recooled with water in a separately arranged heat exchanger.
  • the amount of pressure medium to be circulated is large.
  • the quantity flushed out has to be continuously replenished, which entails expense in terms of device technology.
  • the pamphlet CN 106 224 228 shows a hydraulic pump whose housing is wrapped in a heat pipe. The heat is finally dissipated by re-cooling the heat pipe medium in a water bath.
  • a disadvantage of this solution is, for example, that the heat pipe is exposed to damage from impact due to its external exposure to the hydraulic pump.
  • the publication shows a related solution DE 10 2012 000 986 B3 , in which a cooling jacket for a hydraulic pump is proposed.
  • the disadvantage here is that such a cooling jacket design can take up a comparatively large amount of space.
  • the pamphlets DE 10 2011 054623 A1 and EP 3 168 470 A1 show hydraulic machines with a heat exchange device in a housing interior, the walls of which are disadvantageously complex and multi-part, consisting of components of the hydraulic machine such as sleeve, sealing sections, cylinder drum or drive shaft.
  • the invention is based on the object of creating a hydraulic machine with more efficient cooling, a hydraulic unit with the hydraulic machine and a hydraulic axis with the hydraulic machine.
  • the first task is solved by a hydraulic machine with the features of patent claim 1, the second by a hydraulic unit with the features of claim 11 and the last by a hydraulic axis with the features of claim 12.
  • a hydraulic machine has a housing interior and a group of hydrostatic working spaces mounted therein so that it can rotate about an axis of rotation. When the group rotates, these can be connected alternately to a high pressure and a low pressure of the hydraulic pump, in particular to a corresponding connection.
  • the pressure medium heats up.
  • the working spaces have a leakage volume flow into the interior of the housing.
  • a heat exchange device is accommodated in the interior of the housing for cooling. In particular, this comes into contact with the leakage volume or volume flow.
  • a wall of the heat exchange device is formed by a tube.
  • at least its course in the housing interior, cross section, wall thickness and/or material is designed at least as a function of the intended heat to be transferred and/or the intended temperature of the pressure medium.
  • the ⁇ T Due to the arrangement of the heat exchange device so close to the place where the pressure medium is heated, the ⁇ T is particularly high. A turbulent turbulence of a quantity of pressure medium present due to the leakage in the interior of the housing is also high due to the rotating work spaces. Just one of the two factors mentioned leads to an improved heat transfer, both together make the heat transfer particularly efficient. A small and simply constructed heat exchange surface in the interior of the housing is therefore sufficient. By including the heat exchange device in the A particularly efficient arrangement of the components required for cooling is realized in the interior of the housing.
  • the hydrostatic working spaces are preferably each delimited by a hydrostatic cylinder-piston unit of the hydraulic machine.
  • the hydraulic machine is preferably an axial piston machine and the cylinders are formed by cylinder bores formed in a rotatable cylinder drum. In which the pistons are arranged to be axially displaceable.
  • the axial piston machine is preferably designed in the form of a swash plate, with the pistons being slidably supported on a swash plate which is arranged fixed to the housing or is pivotably mounted.
  • a bent-axis design is possible, with the piston heads being non-rotatably connected to a drive shaft positioned relative to the axis of rotation.
  • the heat exchange device at least partially occupies an annular space which extends radially and axially between an inner wall of the housing and the group.
  • the annular space is particularly useful because it is present in any case and does not have to be expanded, or only slightly so, in order to arrange the heat exchange device.
  • the hydraulic machine is still small.
  • the annular space extends in the direction of the axis of rotation and is at least partially cylindrical around it.
  • it can have a conical or oval section, for example to promote turbulent turbulence of the leakage volume or leakage volume flow and thus make the heat transfer even more efficient.
  • the axis of rotation is encompassed by the heat exchange device in the form of a ring, in particular a circular ring, or polygonal, in particular four-, six- or eight-sided.
  • the shapes mentioned relate to a projection of a contour, in particular an outer and/or inner contour of the heat exchange device, into a plane whose normal is the axis of rotation.
  • a single-phase or two-phase fluid is arranged in the heat exchange device, in particular arranged to flow.
  • a simple design of the heat exchange device that can be produced inexpensively is given if, in a further development, it extends at least in sections in a helical or spiral shape around the axis of rotation. This results in a shape corresponding to specific temperature profile along the coil on the coolant side and/or on the housing interior side.
  • the heat exchange device extends at least in sections undulating around the axis of rotation and in the direction of the axis of rotation. Sections that predominantly extend parallel to or in the direction of the axis of rotation alternate with sections that predominantly extend circumferentially around the axis of rotation.
  • the heat exchange device extends in a direction radially to the axis of rotation with at least two windings or layers.
  • a first winding or layer extends radially inwards in a direction of the axis of rotation up to an apex of the first winding or layer, is guided radially outwards there by an amount of at least one pipe diameter of the heat exchange device and extends with a second wrap or layer back from the apex in the opposite direction.
  • the heat exchange device can extend partially or completely around the axis of rotation, so that an installation space of a component of the hydraulic machine that is occupied in the housing interior, in particular in the annular space, is bypassed by the heat exchange device.
  • the housing interior is delimited by a housing through which a drive shaft rotatable about the axis of rotation, with which the cylinder-piston units are non-rotatably connected, and an inlet and/or a return of the heat exchanger device pass through on the same side.
  • the housing interior is delimited by a housing which has high-pressure and low-pressure connections on the same side and has an inlet and/or a return of the heat exchange device passing through it.
  • the inlet and/or the return is preferably sealed against the housing on the outside.
  • the sealing point is thus easily accessible, controllable and serviceable.
  • a hydraulic unit has a hydraulic machine that is designed according to at least one aspect of the preceding description. At least one of the following is permanently connected to the hydraulic machine, in particular to its housing: a drive machine, in particular an electric machine, via which torque can be transmitted to the hydraulic machine, and a pressure medium tank, which can be connected to the low pressure and/or high pressure of the hydraulic machine.
  • the pressure medium tank can be designed as an open tank (open circuit) or pressure equalization tank (closed circuit).
  • Such a unit is provided, for example, for supplying pressure medium to a hydraulic cylinder.
  • a hydraulic axle has a hydraulic machine which, according to at least one aspect of the preceding description. At least one of the following is permanently connected to the hydraulic machine, in particular to its housing: a drive machine, in particular an electric machine, via which torque can be transmitted to the hydraulic machine, a hydraulic cylinder that can be supplied with pressure medium by the hydraulic machine, and a control block, in particular a valve control block, for controlling the pressure medium supply .
  • a tank or a pressure medium container that can be connected to the low pressure and/or high pressure of the hydraulic machine can be provided.
  • a first exemplary embodiment of a hydrostatic axial piston pump 1 has a housing 2 with an annular housing shell 4, which is closed at the front on the one hand by a drive-through cover 6 and on the other hand by a connection cover 8.
  • a drive shaft 14 is rotatably mounted in the housing 2 via roller bearings 10 , 12 .
  • a cylinder drum 16 is connected in a rotationally fixed manner to the drive shaft 14 , in which a plurality of cylinder bores are introduced parallel to the axis of rotation 18 along a pitch circle arranged concentrically to the axis of rotation 18 .
  • a hydrostatic working piston 20 is guided in an axially displaceable manner in the respective cylinder bore and is slidably supported on the part of the housing cover 6 on a swash plate 22 fixedly arranged in the housing 2 .
  • a control disk 24 penetrated by through-holes (not shown) is arranged between the cylinder drum 16 and the connection cover 8.
  • the through-hole pressure kidneys
  • a housing interior 30 is formed in the housing 2 .
  • An annular space 34 is formed radially between the cylinder drum 16 and an inner wall 32 of the housing.
  • a helical heat exchange device 36 for dissipating thermal energy from the housing 2 extends around this axis and around the axis of rotation 18.
  • the heat exchange device 36 arranged in the annular space 34 heats the thermal Energy is transferred at precisely this point to a coolant flowing in the coil, for example water.
  • a ⁇ T is very high at this point and so is the heat transfer coefficient ⁇ . This means that a large amount of heat can be transferred over a small heat exchange surface.
  • the thermal energy dissipated by means of the cooling water can be used further, since its temperature level is particularly high above the ambient temperature.
  • a hot water supply can be supplied with heat on a secondary basis. This can be implemented, for example, by a 3-way circuit in which the cooling water circulates in the heat exchange device 36 until a sufficient ⁇ T is reached.
  • figure 2 shows a hydrostatic axial piston pump 101 according to a second embodiment.
  • the heat exchange device 136 of that according to figure 1 differs. Although it is also designed as a coil, the individual windings of the coil are in contact with one another in the axial direction.
  • figure 2 an inlet 38 and a return 40 of the heat exchange device 136 are shown. Both 38, 40 pass through the housing cover 6 and are sealed against the housing 2 on its outside (not shown). Cooling water flows through the inlet 38 into the coil of the heat exchange device 136 and, on its way through the coil to the return 40 , absorbs heat from the turbulent leakage oil in the housing interior 134 .
  • the turbulence generated by the cylinder drum 16 in the oil bath of the housing interior 30 proves to be advantageous for the heat transfer coefficient of the heat exchange device 136. Due to the narrower arrangement of the coils of the heat exchange device 136, a heat flow density is greater than in the first exemplary embodiment figure 1 , elevated.
  • the Figures 3 to 5 show the heat exchange device 136 according to FIG figure 2 in a perspective, a side and a plan view.
  • the comparatively short inlet 38 extends parallel to the axis of rotation 18 and is angled at a right angle relative to the axis of rotation 18 in the circumferential direction.
  • the coil then runs with adjacent turns in the direction of the axis of rotation 18 and circumferentially around it until the coil tube runs out tangentially at an apex of the heat exchange device 136 and is angled again at right angles, parallel to the axis of rotation 18 and is fed back as a return 40.
  • FIG figure 6 shows a third exemplary embodiment of a heat exchange device 236, which is based on the helical heat exchange device 36 according to FIG figure 1 builds up.
  • the heat exchange device 236 has two layers or windings in the radial direction instead of just one.
  • the individual windings are spaced apart from one another in the direction of the axis of rotation 18 .
  • the turbulent oil bath in the housing interior 30 can also reach the spaces between the windings.
  • internal windings extend circumferentially and in the direction of the axis 18 with a constant winding diameter up to a crest of the heat exchange device 36.
  • the diameter of the winding is expanded to a larger radius and the windings are returned circumferentially about the axis of rotation 18 in the reverse direction. This results in two windings or layers.
  • the external winding runs out as a return 40 on the side of the inlet 38, parallel to this.
  • figure 7 shows a third embodiment of a hydrostatic axial piston pump 201, which differs from the second embodiment according to figure 2 essentially by the modified heat exchange device 236 according to figure 6 differs.
  • FIG 8 A fourth exemplary embodiment of a hydrostatic axial piston pump 301 according to the invention is shown figure 8 .
  • the embodiment figure 7 it differs in the modified heat exchange device 336.
  • This is now undulating instead of helical.
  • a ring of circumferentially angled sections extending alternately parallel to the axis of rotation 18 is lined up in such a way that the tube of the heat exchange device 336 extends alternately in the circumferential direction around the axis of rotation 18 .
  • a temperature profile of the temperature difference ⁇ T that deviates from the previously shown exemplary embodiments can be implemented.
  • FIG 9 A very similarly constructed embodiment of a heat exchange device 436 is shown figure 9 .
  • the heat exchange device 436 differs in that comparatively few undulating sections are provided.
  • a final embodiment of a heat exchange device 536 shows figure 10 .
  • This extends helically in steps and also has a rectangular cross-section of the filaments. These run horizontally in sections, that is to say in a plane whose normal is the axis of rotation 18, and are connected to one another by sections which are respectively set against the planes.
  • a heat exchange device wound in a stepped and helical manner results in principle.
  • a hydraulic machine with a housing interior space in which an engine is arranged, via which mechanical energy can be converted into hydraulic energy and/or vice versa, subject to leakage.
  • a housing interior Space in which an engine is arranged via which mechanical energy can be converted into hydraulic energy and/or vice versa, subject to leakage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Claims (11)

  1. Machine hydraulique comprenant un espace intérieur de carter (30) et un groupe d'espaces de travail hydrostatiques logé dans celui-ci de manière rotative autour d'un axe de rotation (18), qui peuvent être reliés lors de la rotation du groupe alternativement à une haute pression (26) et à une basse pression (28) de la machine hydraulique et présentent une fuite dans l'espace intérieur de carter (30), dans lequel un dispositif d'échange de chaleur (36 ; 136 ; 236 ; 336 ; 436 ; 536) est reçu, caractérisé en ce qu'une paroi du dispositif d'échange de chaleur (36 ; 136 ; 236 ; 336 ; 436 ; 536) est formée par un tube.
  2. Machine hydraulique selon la revendication 1, dans laquelle le dispositif d'échange de chaleur (36 ; 136 ; 236 ; 336) occupe au moins en sections un espace annulaire (34 ; 134 ; 234 ; 334), qui s'étend entre une paroi intérieure de carter (32 ; 132 ; 232 ; 332) et des unités cylindre-piston hydrostatiques délimitant les espaces de travail.
  3. Machine hydraulique selon la revendication 2, dans laquelle l'espace annulaire (32 ; 132 ; 232 ; 332) s'étend dans la direction de l'axe de rotation (18) et autour de celui-ci, notamment sous forme principalement cylindrique ou conique ou ovale.
  4. Machine hydraulique selon l'une quelconque des revendications 1 à 3, dans laquelle l'axe de rotation (18) est entouré par le dispositif d'échange de chaleur (36 ; 136 ; 236 ; 336) en forme d'anneau, notamment en forme d'anneau de cercle, ou en forme de polygone, notamment en forme de quadrilatère ou d'hexagone ou d'octogone.
  5. Machine hydraulique selon l'une quelconque des revendications précédentes, dans laquelle un fluide est agencé sous forme monophasée ou diphasée dans le dispositif d'échange de chaleur (36 ; 136 ; 236 ; 336).
  6. Machine hydraulique selon l'une quelconque des revendications précédentes, dans laquelle le dispositif d'échange de chaleur (36 ; 136 ; 236 ; 536) s'étend au moins en sections en forme d'hélice ou en forme de spirale autour de l'axe de rotation (18) et dans la direction de l'axe de rotation (18).
  7. Machine hydraulique selon l'une quelconque des revendications précédentes, dans laquelle le dispositif d'échange de chaleur (336 ; 436) s'étend au moins par sections en ondulant autour de l'axe de rotation (18) et dans la direction de l'axe de rotation (18).
  8. Machine hydraulique selon l'une quelconque des revendications précédentes, dans laquelle le dispositif d'échange de chaleur (236) s'étend dans la direction radiale par rapport à l'axe de rotation (18) avec au moins deux enroulements ou couches.
  9. Machine hydraulique selon l'une quelconque des revendications précédentes, comprenant un carter (2, 4, 6, 8) délimitant l'espace intérieur de carter, qui est traversé d'un même côté (6) par un arbre d'entraînement (14) rotatif autour de l'axe de rotation (18), auquel les unités cylindre-piston sont reliées de manière solidaire en rotation, et par une arrivée (38) et un retour (40) du dispositif d'échange de chaleur (136 ; 336), ou qui présente sur un même côté des raccords de haute pression et de basse pression et qui est traversé par une arrivée et un retour du dispositif d'échange de chaleur.
  10. Ensemble hydraulique comprenant une machine hydraulique, qui est réalisée selon l'une quelconque des revendications précédentes, dans lequel sont reliés de manière fixe à la machine hydraulique au moins : une machine d'entraînement, notamment une machine électrique, par l'intermédiaire de laquelle un couple peut être transmis à la machine hydraulique, et un réservoir de fluide sous pression, qui peut être relié à la basse pression et/ou à la haute pression de la machine hydraulique.
  11. Axe hydraulique comprenant une machine hydraulique, qui est réalisée selon l'une quelconque des revendications 1 à 9, dans lequel sont reliés de manière fixe à la machine hydraulique au moins : une machine d'entraînement, notamment une machine électrique, par l'intermédiaire de laquelle un couple peut être transmis à la machine hydraulique, un vérin hydraulique pouvant être alimenté en fluide sous pression par la machine hydraulique et un bloc de commande, notamment un bloc de commande de soupape, pour la commande de l'alimentation en fluide sous pression.
EP19700638.0A 2018-01-11 2019-01-07 Machine hydraulique, unité hydraulique comportant la machine hydraulique et axe hydraulique comportant la machine hydraulique Active EP3737862B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018200345.9A DE102018200345A1 (de) 2018-01-11 2018-01-11 Hydromaschine, hydraulisches Aggregat mit der Hydromaschine, und hydraulische Achse mit der Hydromaschine
PCT/EP2019/050202 WO2019137862A1 (fr) 2018-01-11 2019-01-07 Machine hydraulique, unité hydraulique comportant la machine hydraulique et axe hydraulique comportant la machine hydraulique

Publications (2)

Publication Number Publication Date
EP3737862A1 EP3737862A1 (fr) 2020-11-18
EP3737862B1 true EP3737862B1 (fr) 2022-06-22

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EP19700638.0A Active EP3737862B1 (fr) 2018-01-11 2019-01-07 Machine hydraulique, unité hydraulique comportant la machine hydraulique et axe hydraulique comportant la machine hydraulique

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Country Link
US (1) US11619214B2 (fr)
EP (1) EP3737862B1 (fr)
CN (1) CN111566346B (fr)
DE (1) DE102018200345A1 (fr)
WO (1) WO2019137862A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102021202489A1 (de) 2021-03-15 2022-09-15 Robert Bosch Gesellschaft mit beschränkter Haftung Kühlmodul für eine Hydromaschine, Hydromaschine damit, und hydraulisches Aggregat

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CN101684783A (zh) * 2008-09-28 2010-03-31 海特克液压有限公司 柱塞泵
CN102128186A (zh) * 2011-03-24 2011-07-20 莱芜钢铁股份有限公司 水气双冷液压缸
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CN103939414A (zh) * 2014-05-08 2014-07-23 无锡市长江液压缸厂 一种快速水冷隔水套油缸
JP2016017430A (ja) * 2014-07-07 2016-02-01 Ｋｙｂ株式会社 水圧回転機
CN105201816B (zh) * 2015-09-07 2017-03-22 福州大学 一种斜盘式柱塞泵的缸体自冷却结构
CN106224228A (zh) 2016-08-27 2016-12-14 石延宾 一种液压泵
CN106678117B (zh) * 2016-12-30 2018-10-19 天津市双象工程液压件有限责任公司 一种缓冲液压缸

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WO2019137862A1 (fr) 2019-07-18
EP3737862A1 (fr) 2020-11-18
CN111566346B (zh) 2023-05-30
CN111566346A (zh) 2020-08-21
US11619214B2 (en) 2023-04-04
US20200340460A1 (en) 2020-10-29

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